| Acronym | Meaning |
 | SSUS-D | SSUS For Delta Class Spacecraft |
| EHS | Environmental Health Services |
| APID | Applications Process Identification |
| SSS | Space ShuttleSystem |
| VCN | Verification Completion Notice |
| OMCF | Operations And Maintenance Control File |
| CQD | R Critical Qualification Design Review |
| VLS | Vandenberg Launch And Landing Site |
| MCA | Maximum Crossing Altitude |
| EC | Events Coupler |
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